Add missing using statements for JNI types.

chrome/browser/ui/android/javascript_app_modal_dialog_android.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "chrome/browser/ui/android/javascript_app_modal_dialog_android.h"
 
 #include "base/android/jni_android.h"
 #include "base/android/jni_string.h"
 #include "base/macros.h"
 #include "base/memory/ptr_util.h"
 #include "chrome/browser/ui/javascript_dialogs/chrome_javascript_native_dialog_factory.h"
 #include "components/app_modal/app_modal_dialog_queue.h"
 #include "components/app_modal/javascript_app_modal_dialog.h"
 #include "components/app_modal/javascript_dialog_manager.h"
 #include "components/app_modal/javascript_native_dialog_factory.h"
 #include "content/public/browser/browser_thread.h"
 #include "content/public/browser/web_contents.h"
 #include "content/public/browser/web_contents_delegate.h"
 #include "content/public/common/javascript_message_type.h"
 #include "jni/JavascriptAppModalDialog_jni.h"
 #include "ui/android/window_android.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertUTF16ToJavaString;
+using base::android::JavaParamRef;
 using base::android::ScopedJavaGlobalRef;
 using base::android::ScopedJavaLocalRef;
 
 JavascriptAppModalDialogAndroid::JavascriptAppModalDialogAndroid(
     JNIEnv* env,
     app_modal::JavaScriptAppModalDialog* dialog,
     gfx::NativeWindow parent)
     : dialog_(dialog),
       parent_jobject_weak_ref_(env, parent->GetJavaObject().obj()) {
 }
@@ skipping 158 matching lines @@
   DISALLOW_COPY_AND_ASSIGN(ChromeJavaScriptNativeDialogAndroidFactory);
 };
 
 }  // namespace
 
 void InstallChromeJavaScriptNativeDialogFactory() {
   app_modal::JavaScriptDialogManager::GetInstance()->SetNativeDialogFactory(
       base::WrapUnique(new ChromeJavaScriptNativeDialogAndroidFactory));
 }